Hellooooooooooo Spam Musubi!
My favorite Hawaiian concoction - grilled marinated Spam on a bed of rice, wrapped in seaweed - spam sushi! Ingenius. For the Spam-shy, they also have a Chicken Musubi.
L&L was my first venture into Hawaiian BBQ back in college. Cheap, large portions, deeeeeeeeeelish BBQ Chicken - MMM! Even the mini plates (in the $5 range) are good portions (probably what would be closer to a healthy serving...).
As far as authenticity.... now, while some L&L locations really suck, L&L originated IN Hawaii, and having just been to HI a year ago, I'd say that this location does a smashing job of getting it right. YUM!